In order to meet NJDEP discharge criteria to control run-off from the horse farm to Lawrence Brook and Farrington Lake, Rutgers University subcontracted Enviroscapes to construct a bio-filtration swale. Enviroscapes first staked-out the proposed location for the 510 linear foot central infiltration swale using the services of a licensed State of New Jersey land surveyor. Enviroscapes then excavated existing site soil and stone from the area and stockpile the material on-site. Next Enviroscapes graded the swales to the lines and grades as per the specifications and installed three-inches of sand and four-inches of compost into the bottom of the swale and tilled in with a chisel plow.

Enviroscapes then installed a concrete weir placing on 9-inches of AASHTO #57 stone beneath the concrete weir structures and Elliptical Reinforced Concrete Pipe (ERCP). Enviroscapes connected the ERCP to the concrete weir/outlet structure and a concrete headwall. Excavated soil and stone was used to backfill around the structures and pipe.

Enviroscapes removed the concrete spillway, the concrete apron, and the concrete retaining walls. Enviroscapes mobilized one (1) supervisor/equipment operator, one (1) equipment operator, two (2) field technicians, one (1) tracked excavator w/ mechanical thumb attachment, one (1) tracked excavator w/ hydraulic hammer attachment, one (1) Cat 277 LGP skid steer, utility/support vehicle(s), miscellaneous hand tools (weed whacker, chain saw, etc.), and safety equipment (hard hats, gloves, etc.).

Enviroscapes was subcontracted to minimize the excessive bank erosion that had been occurring along Pike Run. The section we participated in is very flashy. Due to urban development upstream, stormwater fills the stream quickly during a rain event, and the flow is extremely fast. The amount of water and the velocity of flow during storm events have caused the stream to become channelized, with straight-shot parallel banks, as opposed to natural meandering bends.

These extreme flows have eroded the stream banks resulting in common 5-6 foot vertical banks above the water level, disconnecting the stream from its floodplain. Additionally, much of the streambed has been washed away and, in many areas, the bottom of the stream now consists of bedrock.

The existing stream conditions include little to no viable in-stream habitat for a healthy macro invertebrate (insect) community. Macro invertebrates are at the bottom of the food chain; loss of their habitat reverberates through the surrounding ecological community.

Upon notice to proceed, Enviroscapes mobilized to the site and established a staging area and installed various soil and sediment control measures including installing 250 linear feet of silt fence and 250 linear feet of construction fence, and created a construction entrance, which was eventually removed upon project completion. Enviroscapes then installed seven (7) single-wall log deflectors within key sections of Pike Run to deter and deflect stream water flow off the streambank and channel them towards the middle of the stream. This technique successfully reduced erosion along the banks. Following installation of the seven deflectors, Enviroscapes planted and seeded the formally eroded banks to allow natural stabilization of the stream banks to occur.

Enviroscapes installed a stormwater biofiltration system at Bayne Park in Harding Township, New Jersey. For the project Enviroscapes mobilized one (1) site supervisor/equipment operator, one (1) equipment operator, two (2) field technicians, one (1) tracked excavator with mechanical thumb attachment, one (1) CAT 227 LGP ski steer, one (1) F350 utility vehicle, and utility dumps.